Characterizing the mechanism and rate of calcium phosphate precipitation in aerobic granular sludge

Dianna Kitt, Stephany Wei, Mari Winkler, Roland D. Cusick

Research output: Contribution to conferencePaper

Abstract

Aerobic granular sludge (AGS) is a promising technology that has demonstrated the ability to recover phosphorus through the precipitation of calcium phosphate minerals within granules1-3. However, more work is needed to better understand how to control and enhance mineral precipitation within the polymeric matrix of the granule as well as how the pre-existing mineral phases within the granule influence recovery. We performed calcium phosphate precipitation experiments using AGS in order to quantify the impact of calcium pre-enrichment and mineral presence on the extent and rate of phosphate removal. Results have indicated that calcium pre-enrichment and mineral accumulation increases the transition from amorphous calcium phosphate to more crystalline forms and increases the rate and magnitude of phosphorus removal. This work identifies conditions under which AGS enhances mineral phosphate precipitation and suggests that calcium treated granular sludge can be used to recover phosphorus as a stable calcium phosphate mineral.

Original languageEnglish (US)
Pages3550-3554
Number of pages5
StatePublished - Jan 1 2019
Event92nd Annual Water Environment Federation's Technical Exhibition and Conference, WEFTEC 2019 - Chicago, United States
Duration: Sep 21 2019Sep 25 2019

Conference

Conference92nd Annual Water Environment Federation's Technical Exhibition and Conference, WEFTEC 2019
CountryUnited States
CityChicago
Period9/21/199/25/19

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ASJC Scopus subject areas

  • Environmental Chemistry
  • Water Science and Technology
  • Pollution
  • Waste Management and Disposal
  • Ecological Modeling

Cite this

Kitt, D., Wei, S., Winkler, M., & Cusick, R. D. (2019). Characterizing the mechanism and rate of calcium phosphate precipitation in aerobic granular sludge. 3550-3554. Paper presented at 92nd Annual Water Environment Federation's Technical Exhibition and Conference, WEFTEC 2019, Chicago, United States.